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umm. By far the hardest part of 3D printing is drawing a PRINTABLE item. I tried a few free apps including Google Sketchup. What a time wasting mess anything free was!. What would you expect!.
Lots of apps including Sketchup are very easy to use and produce amazing 3D objects on the screen with little effort, alls well until you actually try to PRINT it. 3D modelling and printable 3D modelling are very different things. The requirements to print a 3D model are very specific and often unintuative. To prepare a model suitable for printing manually is difficult and time consuming, Sketchup was not originally designed for 3D printing and produced crap unless stupid time was spent in preperation.
After much homework, I chose Bonzia3D, as it is made for 3D printing and has many tools for model checking/correcting and solid tools. Its not free, but not that expensive. I found it sufficient for 3D printing.
Thats the key, the app must specifically have Solids tools, the more the better, and rule checking/auto correction, it will save many hrs of frustration.
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